Ok, First off, SPECS of all the components used.
Off the shelf, store bought by Joe Shmoe, (me)

Sierra 30 cal .308, 150gr HPBT, match 2190 bullets.
IMR 8208 XBR powder
Winchester Large STD Rifle Primers # WLR (? what ever that is)
Brass is a mix of Winchester and... yeah.

Ok, at first I couldn't find any load data for this powder,
then I ran across some at IMR saying 40 grains = 2500FPS. (starting)

Ok, Factory Winchester is 2800 FPS so I figured I wouldn't mess with 40 grains.

I decided to load:
41, 42, 43, 44 & 45 grains.
What I did load:
41, 42, 42.5, 43, 44 & 45 grains.

Reasonable? I thought so, only having a 20" barrel and aiming for 2800 FPS.
So without any more delay, I'll let the data speak.

41..... 42 ....42.5... 43.....44.... 45
2709 2796 2721 2692 2750 2756
2706 2781 2754
2674
2681
2698


So, I like the looks of the 42 grains.
and the target says if I can hold the gun still, at 100 yards, it's dead on zero.

So with the 20" barrel, I think I am at my limit for THIS powder.

Comments? Recomendations?

Thanks,